title: Cost-saving biological nitrogen removal from strong ammonia landfill leachate.
abstract: The aim of the study was to develop an improved management mode in Ämmässuo landfill (Finland) for leachate ammonium-nitrogen removal, to minimize the leachate management costs and secure compliance with the uptrend requirements of regulations for on-site leachate management. With a single sequential batch simulation reactor, the minimum C/N ratio was detected as 1.7 (adjusted by external carbon addition), to achieve the acceptable removal efficiency of 99, 62 and 74% in NH( 4)-N, total nitrogen and chemical oxygen demand, respectively. Both total nitrogen removal and efficiency of carbon use were correlated with an increasing NO(-) (2) /NO(-) (x) ratio indicating higher performance with denitrification via nitrite. It was estimated that the leachate management cost could be reduced by 28 to 38%.
authors.affiliation: Lahti Center, School of Science and Technology, Aalto University, Espoo, Finland. yu.wang@tkk.fi
authors.forename: Y
authors.initials: Y
authors.lastname: Wang
authors.forename: M
authors.initials: M
authors.lastname: Pelkonen
authors.forename: J
authors.initials: J
authors.lastname: Kaila
mesh_terms: D057919:Biological Oxygen Demand Analysis; D019149:Bioreactors; D002244:Carbon / Q000737:chemistry; D058440:Denitrification; D005387:Finland; D009566:Nitrates / Q000032:analysis; D009573:Nitrites / Q000378:metabolism; D009584:Nitrogen / Q000378:metabolism*; D010100:Oxygen / Q000737:chemistry; D000644:Quaternary Ammonium Compounds / Q000378:metabolism*; D012722:Sewage / Q000737:chemistry; D014865:Waste Disposal, Fluid / Q000191:economics* / Q000295:instrumentation / Q000379:methods*; D014874:Water Pollutants, Chemical / Q000737:chemistry*
chemical_list: D009566:Nitrates; D009573:Nitrites; D000644:Quaternary Ammonium Compounds; D012722:Sewage; D014874:Water Pollutants, Chemical; D002244:Carbon; D009584:Nitrogen; D010100:Oxygen